To come back to the upper stage

PARALLEL INTERPOLATIONS (for both source and target grids) :

Results of the bilinear, bicubic and conservative interpolations for the coupling of ocean-atmosphere models with OASIS4 :
1- exchange of a coupling field between the LMDz atmosphere grid and the ORCA2 ocean grid used
by the IPSL institute (Institut Pierre Simon Laplace).
2- exchange of a coupling field between the (ARPEGE RED grid (global) and ALADIN grid (regional)) for the atmosphere
and the (ORCA2 grid (global) and NEMO-MED1/2 (regional) grid) for the ocean. These grids are used by  Météo-France .

The results are presented in the table below. For each couple of grids, different interpolations are tested.
The interpolated field correponds to the analytical function f1 :

 
For each interpolation, the source field, the target field and the error field are presented. The points at -3 correspond to the masked points.
The points at -1 correspond to points in the target field that do not receive any value, the target field beeing initialized at -1.
The blank values that can be visible in some target fields are points at PSMILe_undef=-280177 (no global search for Gaussred and no
global search and extra-search for conservative interpolations).


LOW RESOLUTIONS : ORCA = 182x149x1 ; ARPEGE RED (BT42) =  6232x1 ; MED = 188x88x1 ; ALADIN = 117x69x1 ; LMDZ = 96x72x1

   Interpolations
Couples                            
of
Grids
BILINEAR INTERPOLATION  2D 
BICUBIC  INTERPOLATION         2D    
bicubic = sixteen
 BICUBIC INTERPOLATION   2D
bicubic = gradient
 CONSERVATIVE INTERPOLATION 2D
ORCA2 T (PARTJ 1 3) / ARPEGE RED (PARTJ 1 3) (= BT42) (M-F)
  f1  
diff mono/para

f1 
diff mono/para
ORCA2 T (PARTI 3 1) / ARPEGE RED (PARTJ 1 1) (= BT42) (M-F) f1  
diff mono/para

f1 
diff mono/para
ORCA2 T (PARTIJ 3 2) / ARPEGE RED (PARTJ 1 1) (= BT42) (M-F) f1  
diff mono/para

f1 
diff mono/para
ORCA2 T (PARTJ 1 3) / ALADIN 50kms (PARTJ 1 3)  (M-F)
 f1 
diff mono/para

f1 
diff mono/para
ORCA2 T (PARTJ 1 3) / LMDZ (PARTJ 1 3)  (IPSL)
 f1 
diff mono/para

f1 
diff mono/para
ORCA2 U (PARTJ 1 3) / ARPEGE RED (PARTJ 1 3)  (= BT42) (M-F)
f1 
diff mono/para 		f1
diff mono/para
ORCA2 U (PARTJ 1 3) / ALADIN 50kms (PARTJ 1 3)  (M-F)
f1
 diff mono/para 		f1
diff mono/para
ORCA2 V (PARTJ 1 3) / ARPEGE RED (PARTJ 1 3)  (= BT42) (M-F)
f1
 diff mono/para 		f1
diff mono/para
ORCA2 V (PARTJ 1 3) / ALADIN 50kms (PARTJ 1 3)  (M-F)
f1 
diff mono/para 		f1
diff mono/para
ARPEGE RED (PARTJ 1 3)  (= BT42)/ ORCA2 T (PARTJ 1 3)  (M-F)
 f1 
diff mono/para

f1 
diff mono/para
ARPEGE RED (PARTIJ 1 3)  (= BT42)/ ORCA2 T (PARTJ 1 1)  (M-F) f1
diff mono/para

f1 
diff mono/para
ARPEGE RED (PARTIJ 3 2)  (= BT42)/ ORCA2 T (PARTI 1 1)  (M-F) f1 
diff mono/para

f1 
diff mono/para
ARPEGE RED (PARTJ 1 3)  (= BT42)/ ORCA2 U (PARTJ 1 3)  (M-F)
f1 
diff mono/para

ARPEGE RED (PARTJ 1 3)  (= BT42)/ ORCA2 V (PARTJ 1 3)  (M-F)
f1 
diff mono/para

ALADIN 50kms (PARTJ 1 3) / MED1/2 T (PARTJ 1 3)  (M-F)
 f1 
diff mono/para

f1 
diff mono/para
ALADIN 50kms (PARTJ 1 3) / MED1/2 U (PARTJ 1 3)  (M-F)
f1 
diff mono/para 		f1
diff mono/para
ALADIN 50kms (PARTJ 1 3) / MED1/2 V (PARTJ 1 3)  (M-F)
f1 
diff mono/para 		f1
diff mono/para
LMDZ (PARTJ 1 3) / ORCA2 T (PARTJ 1 3)  (IPSL)


f1 
diff mono/para
LMDZ (PARTJ 1 3) / ORCA2 U (PARTJ 1 3)  (IPSL)
f1 
diff mono/para 		f1
diff mono/para
LMDZ (PARTJ 1 3) / ORCA2 V (PARTJ 1 3)  (IPSL)
f1 
diff mono/para 		f1
diff mono/para